TeamT5 Anti-Ransomware Flaw: Path Traversal Exposes File Deletion Risk
The National Vulnerability Database has detailed a critical Arbitrary File Deletion vulnerability, CVE-2026-5966, affecting TeamT5’s ThreatSonar Anti-Ransomware. Exploiting this flaw requires only authenticated web access. Attackers can leverage a Path Traversal technique to delete any file on the system, bypassing intended security controls.
With a CVSS score of 8.1, this vulnerability presents a significant risk. The National Vulnerability Database highlights that authenticated remote attackers can achieve high impact on both data integrity and system availability. Defenders must prioritize patching or mitigating this exposure, as successful exploitation could lead to system instability or data loss, undermining the very protection the software is designed to provide.
What This Means For You
- If your organization uses ThreatSonar Anti-Ransomware, immediately investigate and apply any available patches or workarounds from TeamT5. Audit your systems for signs of unauthorized file deletion, especially if the software is in use.
Related ATT&CK Techniques
🛡️ Detection Rules
3 rules · 6 SIEM formats3 detection rules auto-generated for this incident, mapped to MITRE ATT&CK. Sigma YAML is free — export to any SIEM format via the Intel Bot.
CVE-2026-5966 - TeamT5 Anti-Ransomware Arbitrary File Deletion via Path Traversal
Indicators of Compromise
| ID | Type | Indicator |
|---|---|---|
| CVE-2026-5966 | Path Traversal | ThreatSonar Anti-Ransomware |
| CVE-2026-5966 | Arbitrary File Deletion | Authenticated remote attackers with web access can exploit Path Traversal to delete arbitrary files on the system. |
Written by SCW Vulnerability Desk
Source & Attribution
| Source Platform | NVD |
| Channel | National Vulnerability Database |
| Published | April 20, 2026 at 11:16 UTC |
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